
the
length
of
a
straight
line
passing
through
the
center
of
a
circle
and
connecting
two
points
on
the
circumference

Any
right
line
passing
through
the
center
of
a
figure
or
body,
as
a
circle,
conic
section,
sphere,
cube,
etc.,
and
terminated
by
the
opposite
boundaries;
a
straight
line
which
bisects
a
system
of
parallel
chords
drawn
in
a
curve.

A
diametral
plane.

The
length
of
a
straight
line
through
the
center
of
an
object
from
side
to
side;
width;
thickness;
as,
the
diameter
of
a
tree
or
rock.

The
distance
through
the
lower
part
of
the
shaft
of
a
column,
used
as
a
standard
measure
for
all
parts
of
the
order.
See
Module.

A
straight
line
through
the
center
of
a
figure,
dividing
it
in
half;
as,
the
diameter
of
the
earth
is
7,
926
miles.

The
measure
through
or
across:
a
straight
line
passing
through
the
centre
of
a
circle
or
other
figure,
terminated
at
both
ends
by
the
circumference.

Straight
line
passing
through
the
centre
of
a
circle
and
terminated
at
both
ends
by
the
circumference;
distance
through
the
centre.

A
line
through
the
center,
as
of
a
circle
or
sphere,
terminated
at
the
boundary
thereof;
the
length
of
such
a
line.

A
straight
line
passing
through
the
centre
of
a
circle
from
circumference
to
circumference,
and
dividing
it
into
two
equal
parts;
the
length
of
a
right
line
passing
through
the
centre
of
an
object,
from
one
side
to
the
other.

The
measure
of
a
body
through
from
side
to
side;
a
straight
line
passing
through
the
centre
of
a
circle,
having
both
ends
terminated
by
the
circumference.
X